Phonograph arm and horn attachment



G. A. HOOVER. PHoNoGRAPH AR M AND HORN ATTACHMENT.

APPLICATION FILED OCT. i6. 1918.

Patented June l0, l).

3 SHEETS-SHEET l.

G. A. HOOVER. PHONOGRAPH ARM AND HORN ATTACHMENT.

APPLICATION FILED OCT. I6, 191B.

Patented J une 10, i919.

3 SHEETS-SHEET-2.

G.A.Hoove|a.v PHONOGRAPH AHM AND HORN ATTACHMENT.

APPLICATION FILED 0CT16, i918.

3 SHEETSSHEET 3.

Patented J une 10, 1919.

1f vfv/f urs GEORGE A.. HOOVER, OF SAL'LISAW, OKLAHOMA.

PHONOG-RAPH A RM AND .HORN .ATTACHlVIEN'l.

Specification of Letters Patent.

Patented June 10, 191.9.

Application led October 16, 191'8. `Serial No. 258,474.

To all 'whom it may concern.'

Be it known that I, GEORGE A. HOOVER, a

.citizen ofthe United States, residing at Sallisaw, in the county of Sequoyah and State of Oklahoma, have invented a certain new and useful Improvement in Phonograph Arm and Horn Attachments, of which the following is a specification.

My invention relates to improvements in phonograph arm and horn attachments.

It relates particularly to the type of phonograph having a` casing in which a horn 1s mounted and in which the reproducer arm is pivoted on the h'orn so as to swing vertically and laterally.

One of the objects of my invention is to 'provide novel means for adjusting the horn to different positions so as to vary the distance between the reproducer arm and the record table.

Another object of my invention is the provision of novel means for pivotally supporting the horn and acoustically insulating` it from the casing.

Still another object of my invention is the provision of means for pivotally supporting the horn and holding the side walls of the casing from lateral movement by means of the horn support.

Another object of my invention is the provision of a novel joint for connecting the horn and reproducer arm and by which dust is excluded from the joint.

' The novel features of my invention are hereinafter fully described and claimed.

In the accompanying` drawings, which illustrate the preferred embodiment of my invention,

Figure l is a view partly in vertical section and partly in side elevation of my improvement in phonograph arm and horn attachments, shown mounted in a casing of an ordinary type.

Fig. 2 is a vertical sectional view on thev line 2 2 of Fig. 1, the record table'being removed.

Fig. 3 is an enlarged cross section on the line 3 3 of Fig. 2.

Fig. lis an enlarged vertical sectional view on the line 4 4 of Fig. 2.

Fig. 5 is an enlarged view partly irl-plan, partly in horizontal section and partly broken away, showing the reproducer arm a part of a record and a part of the casing and parts connected therewith.

Fig. 6 is a vertical section on the line 6 6 Vof Fig. 7.

Fig. 7 is a vertical section on the line 7 7 of Fig. 6.

Fig. 8 is a cross section on the line 8 8 ofFig. 7.

Similar reference characters designate similar parts in the different views.

- l designates an ordinary phonograph cas-I ing having mounted in it a horn 2 ofthe usual type. The casing 1 is provided with afloor 3, above which is an ordinary horizontal revoluble record support comprising a table 4.- adapted to carry a dislr record 5.

The floor 3 is provided with an opening 6, through which the reiving end of the horn 2 extends and is vertically adjustable as hereinafter described.

As shown in Figs. 6 to 8, the upper or receiving end of the horn 2 is provided with a connecting member. 7 having at-its upper end a spheroidal head 8 fitted for universal movement in a recess rovided in the under side of a downward y facing socket portion 9 of a horizontal tubular reproducer arm 10. The socket portion 9 has mounted lextend into a horizontalA peripheral groove 12 provided centrally in the spheroidal head S. The vlatter is provided in the groove 12 at opposite sides respectively of one of the screws 11 with two abutments 13 adapted to strike the adjacent screw and limit the lateral swingin of the arm 10. The member 7 is provi ed with a. peripheral shoulder 14, upon which the socket portion 9 is adapted to rest so as to hold the soundbox casing 15 out of contact with the record- 5 when no stylus or needle is mounted in the' stylus holder of the stylus bar 16 which .is mounted on the sound box 15.v

For mounting the horn 2 so that it can be so adjusted as to move the reproducer arm 10 toward or from the record table 4, I preferably provide asupport which is pivoted A port on a horizontal axis.

4In the preferred embodiment of, my -invention, as shown in the drawings, the horn support and its adjusting means comprise the following described parts.

l 17 designates a substantially rectangular vertical frame through which the horn2extends. Extending vertically through the' top of the frame 1'( isa bolt 18,'both ends of which are screw-threaded and provided respectively with nuts 19 and 20, as shown in Figs. 41 and 2.

The upper sideof the horn 2 is provided with ahole 21 through whichl the bolt'18 exl tends, and-'which is .of sufficient diameter to prevent the bolt 18 lia-ving contact with the horn.. E ncrcling the bolt 18 andV clamped against the innerside of the horn 2 'by the,

nut 2O is a collar 22 of soft rubber, felt or other poor sound 'eonductor. Clamped against the outer side of the horn 2 'and encircling the bolt 18 is a collar 23 similar to the collar 22. Bearing a 'ainst the collar 23 and the frame 17 is a co lar 24 which may be of wood 'or metal; The manner ofsupinnere'nds of which are mounted in threadedholes provided therefor in the adjacent side A provide porting the horn 2 abovedescribed servesto ac cousticallyinsulate the .horn at the' point of support from` vthe frame 17.

The frame 17, as Shown'in Fig. 2, at itsv opposite sides'is provided vwith two laterally oppositelyextending trunnions v25, each lor' which' is provided with a vertical arm 26 having a verticalislot.27,'through which ex' tend'two clamping screws "28, the threaded of the frame 17'. d By loosening the-screws 28,l the trunnions '25 can'be verticall adjustable to desired. positions on the rame 17 and then retained' in said positions by tightening the' screws 28. u

For pivotally supportlng the trunnions 25 in a manner s'uch that the latter will hold* the side walls of the casing 2, `from lateral movement due to rough handling 'in shipping orotherwise, I provide two bearing plates 29, which are respectively secured in any suitable manner, as by screws 30, to the inner sides of the side walls of the casing 2. Eachbearingplate 29v is provided with a vert-ical slot 31 having-an enlarged upper end ada ted to receive a head 32 which is at the outer end of adjacent trunnion 25. The head 32 is of larger diameter than'the lower end of the slot 31, but is of less diameter than the upper portion ofsaid slot. At the inner side of thehead 32 the side walls ot the casing are held from spreading and the frame 1'( is pivotally sup-I ported. j

Extending rearwardly and u wardly from the lower part of the frame 7 is an arm 34 having a screw-threaded upper end which extends through a hole 35 in the floor 3, and which has mountedv on saidtl'lreade'd end a nut 36 having a peripheral-grooved portion 37 rotatably and slidably mounted in a slot 38 provided in a horizontal' platel 39 secured to the upper side of the floor 3 over the hole 35.

By adjusting the i-'nut 36 on' the arm 34,

the' frame 17 may ne'swung on its axisv to diderent positions, thereby swinging the upper ,end ofthe horn2 upwardly or downwardly, so as to raise or lower the arm 10 with respect to the table 4. By means of this adjustment, the sound box 1,5 may be adjusted to the proper position adapted for the proper 'operation of the stylus o r needle 4Q on the 'record' 5.', To permit the nut 36 to have the necessary sliding movement in the plate 39, the slot 38 -extends to the ,rear

edge of `the plate-39. The'holes'6 and 35' are of suiicient diameter to permit the horn '2 and nut 36 to have the. desired adjustment.

For additionallyf'supportin' the ho'rn 2, there may be provided a bo t 41, Fig 1,

.which is screw-threaded at both ends and has mounted on it, two nuts'42 and 43. The bolt 41 extends through the arm' 34 and through but not touching the adjacent wall of the horn 2. The nut 43 bears against the rubber washer 44, which bears against the inner side of the horn. A similar washer 45 I' bears against the outer side of the horn, vsaid two washers'being mounted on the bolt 41. A collar 46 vencircles the bolt 41 and bears lga-inst the. arm 34 and washer 45.

The horn 2 1 is thus supported by but A acoustically insulated from the arm 34.'

The needle 40 is'disposed at the rear of a vertical plane extending through the trunnions 25.. Thus ,by turning the nut 36,

the upper end ofthe' arml 34 may-beraised or lowered, thereby swinging the frame 17 I on its axis so as to raise or lower the arm 10 through the -intermediacy of the horn 2 and the ball and socket joint connecting the arm with the horn., Y

By vmeans of the mounting of the horn in the casing as described; the horn andthe reproducer arm are both acoustically insulated rom the casing, while at the same time being adjustable in the casing toxdiiferent positions. f I d o not -limit my invention to the structure shown and described, as modifications, within the scope of the appended claims, maybe made Without departing fromV the' spirit of mv invention. v What I claim is 1.v The combination with a phonograph hoin, ofa reprodueer arm carried thereby, a

Icasing, a record table in the casing, and a support for the horn pivoted to the casing; havmg a screw -threadedarm and av nut mounted on the arm engaging the casing for casing incense adjusting the support on its ivots to diii'erent positions for varying t e distance be tween the reproducer arm andthe record table. -I

2. The combination witha phonograph horn, of a reproducer arm carried-thereby, ,a having a floor below the reproducer arm and provided with an opening through arm 'and having an opening through which,

the'horn extends and is adjustable vertically, a record table intermediate of the reproducer arm and, the floor, and asupport pivoted to the casing on a horizontalaxis and carrying the horn and having a screw threaded arm., and a nut fitted to sai-d threaded arm and engaging said floor for swinging. the support to'dierent positions on its axis so as to vary the distance of the reproducer arm from the record table.

4:. The combination with a phonograph horn, of a casing,and a supportfor the horn pivoted to the side Walls of the casing and having means for holding the side walls from lateral movement.

5. The combination with a' phonograph horn, of a casing, and a support carrying the horn and pivoted on a horizontal axis to the casing and having adjustable means engaging the casing for holding the support in such positions .to which the support may be swung.

6. The combination with ,a phonograph horn,of a casing having a ioor, provided with an opening through which'thefhorn ex- 'tends and is vertically adjustable, and a sup- 'port pivoted on .a horizontal axis to the casing andcarrying the horn. A

7. The combinationwith af phonograph horn, of'acasing having -a floor provided with an opening through which the horn extends and is vertically adjustable, and a supportfor the horn pivoted on a horizontal axis to the casing and having` a screw threaded arm and a nut mounted on the threaded arm and rotatably engaging the casing. 8, The combination with a phonograph horn, of' a casing having a floor providedwith an opening through which-the horn eX- tends and is vertically vadjustable and provided With a plate having a slot, anda sup-' port carrying the' horn and pivoted -on a horizontal axis to the casing and haviigla screw threaded arm and a nut mounted on the arm and 'rotatably and slidably mounted in said slot. A

9. The combination with a phonograph hoi'n, of a casing. provided with two bearing plates on opposite inner walls respectively, and a support for the horn having tivo laterally extending trunnions respectively pivoted in said bearing plates and having means for engaging said plates to hold 'the trunnions from endv'v'ise movement with respect to said plates. ln testimony whereof have signed my name to this specification.

GEORGE A. Hoover... 

